You won’t lost much weight in that short time. What you can do is make your body looks a Little slimmer.
Drink lots of PURE water, reduce your daily food intake, especially the one with high sodium/salt. (they will hold water in the body and make you bloated)
Take body wrap treatment at your local slimming center.
Wear a good full-body-sculpting underwear. usually it can make you look 2-3 sizes smaller, and hidden the flabs